No, you would need an ID-20RW (or WR, the datasheet uses them interchangeably) to write to tags. Even then, the datasheet talks about using a different card format, the Temec Q5555.
I don’t know whether the Temec format is compatible with the EM4001/2 or not.

I have been experimenting with tags that have about 1" diameter antennas. I was able to read the tags through a 1.5" solid piece of wood. In fact, it read the tag 3.5" away from the face of this reader.
I found the tags on a different site, which I will not post, since this is Sparkfun’s site. A quick Google can lead you to a myriad of different tags. Make sure your encoding matches though.

scratch that, I was personally able to get it to work on 3.3V.9000:We could not get this LCD to update the display powered with 3.3V in lab. The display holds data at 3.3V, but we had to bring the power up to around 4.5V in order for the display to update.
Be sure to check page 19 of the datasheet.

We could not get this LCD to update the display powered with 3.3V in lab. The display holds data at 3.3V, but we had to bring the power up to around 4.5V in order for the display to update.
Be sure to check page 19 of the datasheet.

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